Device for conducting the thread in winding machines



May Z, 1939.

H. DERSEN DEVICE FOR C-ONDUCTING THE THREAD IN WINDING MACHINES Filed April 15, 1936 fig. 7

IN V! 7'0 K s Sheets-Sheet 1 May 2-, 1939.- H. DERSEN 2,156,472

DEVICE FOR CONDUCTING THE THREAD IN WINDING MACHINES Filed April 15, 1936 s Sheets-Sheet 2 May 2, 1939. H. DERSEN I 2,155,412

DEVICE FOR CONDUCTING THE THREAD IN WINDING MACHINES Filed April 15-, 1936 3 Sheets-Sheet 3 Fig.7.

4 arwaaghmm Patented May 2, 1939 DEVICE FOR CONDUCTING THE THREAD IN a WINDING MACHINES Heinrich Dersen, Krefeld, Germany, assignor to Maschinenfabrik Carl Zangs A.-G.

(Herm.

Schroers Nachfl.) Krefeld, Germany Application April 15, In Germany 9 Claims.

The invention relates to a device for conducting the thread for winding machines or the like in which the thread being wound is moved to or'not and merging at the ends the one into theother are known in the art. In these devices, however, the preventing of the jumping over of the thread at the points of intersection from the guiding into the oppositely directed groove always presents great difficulties. In order to avoid having the thread jump at the points of intersection from the guiding groove into the oppositely directed groove, ithas already been proposed to arrange in-front of the cylinder which carries the guide groove a separate movable thread guide.

Such a thread guide is moved to and fro by the grooved cylinder by means of a transmission gear inaccordance with the pitch of the guide groove. Besides the complicated mechanism of the second thread guide this arrangement presents the inconvenience that, owing to the necessity of the thread guide partsbeing moved to and fro, the running-on speed of the thread is limited. The proper operation of the device is complicated by the presence of the second movable thread guide.

An arrangement has also become known in which in front of such a grooved cylinder, a circulating additional thread guide is arranged which permits a higher running-on speed of the thread but renders the winding arrangement :complicated as regards construction and operation.

. In another known arrangement of this kind no additional thread guide is provided. For avoiding the reversing of the thread at the points of intersection, so;-called guiding elements are arranged on the grooved cylinder, which consist of different depths of the intersecting grooves and in bevelled faces on the intermediate pieces at the points of intersection, or in that 1936, Serial No. 74,557 April 23, 1935 In another known construction of the grooved cylinder the arrangement of the grooved cylinders at the intersecting points is designed to avoid an additional thread guiding so that actually one groove is continuous and the opposite groove is interrupted in front of and behind the points of intersection. The re-c'atching of the thread behind the points of intersection is, however, diflicult in such an arrangement.

In all these arrangements it is still possible that the thread may reverse its direction of movement, which may lead to faulty bobbins.

For the production of narrow bobbins these grooved cylinders are well-suited. However, the 'wider the groove to be produced or the greater the distance which the thread to be conducted to and fro has to travel, the more diflicult will it be to shape in these arrangements the points of intersection of the groove so that an unimpeded passingof the thread through the points of intersection is ensured.

This invention relates to grooved cylinders of the two last mentioned types having thread guiding grooves in which, for instance, the guide grooves'do not intersect, 1. e., a groove extends continually at the points of intersection, whereas the oppositely directed grooveis shallower at these points 'or interrupted in front and behind of the'point of intersection; and this arrangementavoids the existing inconveniences by posi+ tioning in front of such a cylinder a guiding element which is not movable to and fro, for effecting anadditional thread displacement in the direction of the thread travel. element consists for instance of a stationary bar which either has inclined portions, 1. e., differences in height over the whole width of the grooved cylinder or is inclined in the direction of its width from both sides towards the middle. This inclined face may be curved. The guiding element "may also be rectilinearly stepped. In this instance small diflerences in height exist only at the points of intersection of the grooves.

In cases where a guide element having inclined portions throughout its whole width is employed, one groove of the guide cylinder must be continuous, the opposite groove being, however, interrupted or of less depth in front of and behind the points of intersection. If guide elements are employed which have inclines from both sides towards the middle or which are This guiding rectilinearly stepped from both sides towards the the middle towards the right and left respectively are continuous and the portions of these same grooves. which lead backwards towards the middle are interrupted or have shallower depth. Before the thread runs through the grooves of the guide cylinder onto the spool, it slides over the guide element arranged in front of the cylinder. If the thread is being guided by a continuous groove, it slips without resistance over the incline of the guide element. If the thread reverses its direction of movement, it is conducted by a groove which has shallower depth or is interrupted in. front of and behind the point of intersection. If the thread arrives at the point at which the guide groove is interrupted in front of the point of intersection or if it is guided by a groove of shallower depth, it is lifted over the continuous or lower situated groove and is for a moment-freely movable. The incline ofthe u de element begins then to act and shifts the thread in the direction of the inclination of the interrupted groove. By means of the incline at the points of intersection, an additional lateral displacement is therefore imparted to the thread in the direction of the incline so that it is then guided by the correct groove.

An embodiment of the invention is illustrated I in the accompanying drawings by way of example in connection with the grooved cylinder in which one guide groove is continuous and the other guide groove interrupted in front of I and behind the point of intersection.

Fig. 1 shows in front elevation the device for guiding the thread. In this arrangement the thread to be guided is conducted over a guiding element with inclination in one direction.

Fig. 2 shows the arrangement of Fig; l-in side elevation.

Fig. 3 shows the'device in which the thread is conducted over a guidev element which is stepped in straight lines'towards the middle.

The incline for conducting the thread from the interrupted groove into the groove beginning again is provided only at the tion of the grooves.

Fig. 4 shows the arrangement of 3 in side elevation.

Fig. 5 shows the guiding element with inclination from both sides towards the middle and in curved shape.

Fig. 6 is a side elevation of Fig. 5.

Fig. 7 shows the guide element alone.

Figure 8 is a plan view of the same guide element;

Figure 9 is a plan view of a similar guide element which is bent at an angle at-its mid portion; and

Figure 10 is a plan view of a guide element laterally curved throughout itslength.

The thread 2 from the reserve bosom is guide cylinder 4 a guide-rail i is arranged which,

as shown clearly in Figure 1 of the drawings, are inclined towards one side throughout the whole length of the grooved cylinder. If desired,

the guide bar may he stepped in straight line portions and have inclined surfaces only at the points at which the grooves are interrupted similar to the arrangement illustrated in Figures 3 cylinder.

points of intersec-' and 4 in connection with the second embodiment of the invention. The thread 2, before it gets onto the grooved cylinder 4 slides over this guide bar 6. If the thread 2 is directly conducted by the groove 1 interrupted in front of the points of intersection, it is lifted shortly before the point of intersection of the grooves by the point of interruption and lies free. The incline of the guide bar 6 performs its function at this moment. By the thread pull the thread 2 slides over the inclination and is additionally shifted in the direction of the continuation of the groove 1 after the interruption therein where it crosses the continuous groove designated by the reference numeral 9, whereby it is ensured that the thread is caught again by the groove 1. With this object in view the groove 1 beginning again at 8 in the direction of movement of the cylinder is slightly widened. The two grooves i and 9 may be considered as beginning and ending at the points of reversal i0 near the ends of the When the thread 2 passes over the incline of the guide hart on its return movement, it is always guided by the continuous uninterrupted guide groove 9. The inclination of theguide bar is, however, so little, that the thread is not stressed during the backward movement over the same.

As already indicated, in the embodiment illustrated in Figures 3 and 4, the grooves are differently formed on each side of the middle of the cylinder. The interrupted portions of the grooves are designated 1 and the uninterrupted portions 9'. The guide bar indicated at It is stepped and the straight portions are connected by inclined portions which occur at the points of interruption of thegroove portions 1', and which function in the'same manner as the continuous sloping bar 6 of the embodiment first described, to give the thread-a forward impetus at these points .in whatever direction the interrupted portion requires. In this case, of course, the interrupted portions 1' of the grooves both lead toward the center of the guide roller.

Considered from one standpoint, each half of the cylinder in Figures 3 and 4 maybe considered equivalent to the full cylinder in Figures 1 and 2. except that the interrupted and uninterrupted portions of the. grooves on one side guide bar 26 is providedwith' continually curved surfaces upon each side of the center line thereof. In Figure 9 a similar guide member ll is shown which is provided. with an angular bend at the central portion thereof. A still further modification indicated at 46 in Figure 10 comprises a similarly notched guide member which is pro vided with a continuous lateral curvature.

It is not necessary to make the guide element or guide rail in one piece as it may be composed of several parts without departing from the invention. I

From the. above descriptions it will be understood that one of the grooves-namely the interrupted one-will have less thread retaining capacity than the other and may be considered typical of various kinds of grooves of diminished guiding ability, such as those described in the early paragraphs of the present specification. The uninterrupted or continuous groove. of

'fcourse, is the one of greater thread retaining capacity, and these designations may be used in certain of the subjoined'- claims. 4

I claim: 1. In a winding machine, in combination,

means for supporting a spool during a winding operation, and mechanism for guiding a thread passing onto the spool, said mechanism including a revoluble cylinder having separate grooves formed therein for traversing the thread in opposite directions axially of the cylinder, one of said passing onto the spool, said mechanism including a revoluble cylinder having separate grooves formed therein for traversing the thread in opposite directions axially of the cylinder, one of said grooves having greater thread retaining capacity than the other, andmeans positioned adjacent the cylinder over which the thread passes on its way to the cylinder for urging the thread to move axially of the cylinder in a direction to follow the groove of less thread retaining capacity, said means resisting but not preventing the thread from following the groove of greater thread retaining capacity.

In a winding machine, in combination, means for supporting a spool during a winding operation, and mechanism for guiding a thread passing onto the spool, said mechanism including a revoluble cylinder having separate grooves formed therein for traversing the thread in opposite directions axially of the cylinder, one of said grooves having greater thread retaining capacity than the other, and a stationary guide positioned adjacent the cylinder, over which guide the thread passes on its way to the cylinder, for urging the thread to move axially of the cylinder in a direction to follow the groove of less thread retaining capacity.

4. In a winding machine, in combination,

means for supporting a spool during a winding operation, and mechanism for guiding a thread passing onto the spool, said mechanism including a revoluble cylinder having separate grooves formed therein for traversing the thread in opposite directions axially of the cylinder, one of said grooves having greater thread retaining capacity than the other,.and a stationary guide member positioned adjacent the cylinder, over which the thread passes on its way to the cylinder, for urging the thread to move axially of the cylinder in a direction to follow the groove of less thread retaining capacity, said guide member being coextensive in length with the groove of less thread retaining capacity.

5. The combination set forth in claim 4 in which the guide member comprises a straight uniformly sloping bar disposed angularly to the axis of the cylinder.

- 6. In a winding machine, in combination,

means for supporting a spool during a winding operation, and mechanism for guiding a thread passing onto the spool, said mechanism including a revoluble cylinder having a substantially member positioned adjacent the cylinder, over which the thread passes on its wayto the cylinder, and having spaced portions for urging the thread to follow the portions of the groove of less thread retaining capacity.

- 7. The combination set forth in claim 6 in which the portions of less thread retaining capacity lead toward the longitudinal mid-point of the cylinder and the stationary guide member has two thread guiding surfaces each inclined from the outer ends toward the center thereof to urge the thread to follow said portions of the grooves.

8. In a winding machine, in combination, means for supporting a spool during a winding operation, and mechanism for guiding a thread passing onto the spool, said mechanism including a revoluble cylinder having substantially helical grooves formed in the surface thereof, the convolutions of said grooves leading in opposite directions axially of the cylinder and intersecting at a plurality of points therealong, one of said grooves being interrupted at certain of said points of intersection and the other continuous, and a stationary guide member positioned adjacent said cylinder, over which the thread passes on its way to the cylinder, said guide having a stepped thread contacting surface with spaced inclined portions thereon, each of said inclined portions disposed opposite one of said points of intersection on the cylinder whereby the thread means for supporting a spool during a winding operation, and mechanism for guiding a thread passing onto the spool, said mechanism including a revoluble cylinder having substantially helical grooves formed in the surface thereof, the convolutions of said grooves leading in opposite directions axially of the cylinder and intersecting ata plurality of points therealong, one of said grooves being interrupted at certain of said points of intersection and the other continuous, the reverse condition prevailing at certain other of said points of intersection, and a stationary guide member positioned adjacent said cylinder, over which the thread passes on its way to the cylinder, said guide having a stepped thread contacting surface with spaced inclined portions thereon, each of said inclined portions disposed opposite one of said points of intersection on the cylinder and sloping in the direction of lead of the interrupted groove portion at said point,

whereby the thread is urged to move in the direction to follow the continuations of the interrupted grooves.

' HEINRICH DERSEN. 

